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Table 5 Rare earth element concentrations (ppm) for the deep sea sediments of the Southwestern Gulf of Mexico

From: Textural and geochemical characteristics of late Pleistocene to Holocene fine-grained deep-sea sediment cores (GM6 and GM7), recovered from southwestern Gulf of Mexico

Core No. GM6
 Section (cm) 0–1 31–32 46–47 61–62 76–77 91–92 121–122 136–137 151–152 166–167 180–181
  La 30.3 28.7 32.9 30.5 29.5 33.4 31.3 32.3 30.7 33.4 29.8
  Ce 60.4 59.6 64.8 58.5 57.7 64.3 59.4 60.7 57.6 65 58.8
  Pr 7.3 7.15 7.95 7.26 7.11 8 7.45 7.58 6.74 7.93 6.89
  Nd 26.1 26.1 28.5 25.5 25.5 28.7 26.9 27.7 25.9 28.4 26.3
  Sm 5.31 5.26 5.71 5.25 5.02 5.68 5.14 5.48 5.25 5.52 5.24
  Eu 1.03 1.15 1.15 1.03 1.01 1.2 1.04 1.14 1.06 1.14 1.07
  Gd 4.49 4.52 4.83 4.79 4.32 4.95 4.65 4.86 4.24 4.88 4.58
  Tb 0.717 0.725 0.764 0.745 0.685 0.785 0.736 0.772 0.715 0.758 0.726
  Dy 3.96 3.95 4.2 3.9 3.79 4.28 3.77 4.08 3.77 4.12 3.78
  Ho 0.821 0.834 0.828 0.813 0.769 0.862 0.808 0.843 0.775 0.822 0.789
  Er 2.14 2.12 2.23 2.13 2.02 2.31 2.14 2.23 2.13 2.18 2.18
  Tm 0.31 0.311 0.334 0.301 0.305 0.325 0.291 0.33 0.295 0.316 0.308
  Yb 2 1.98 2.17 1.95 1.98 2.24 1.96 2.17 1.95 2.16 1.98
  Lu 0.303 0.301 0.324 0.302 0.294 0.32 0.291 0.32 0.29 0.324 0.31
  LREE 129 127 140 127 125 140 130 134 126 140 127
  HREE 14.7 14.7 15.7 14.9 14.2 16.1 14.6 15.6 14.2 15.6 14.7
  ΣREE 145 143 157 143 140 157 146 151 141 157 143
  Eu/Eu* 0.93 1.03 0.958 0.898 0.952 0.991 0.934 0.967 0.982 0.968 0.959
  Ce/Ce* 0.885 0.907 0.873 0.855 0.868 0.856 0.848 0.845 0.871 0.87 0.893
 Section (cm) 196–197 210–211 222–223 226–227 241–242 256–257 300–301 316–317 330–331 Mean ± 1 s (n = 20)
  La 30.8 31.2 30.2 29 31.6 31.8 30.5 33.1 31.8 31.1 ± 1.40
  Ce 60.4 59.1 57.3 55.1 60.5 60.1 60.2 65.2 60.5 60.3 ± 2.73
  Pr 7.36 7.35 7.05 6.94 7.24 7.49 7.56 7.93 7.38 7.38 ± 0.36
  Nd 26.3 26.7 25.4 24.8 26.6 26.8 27.5 28.2 27.5 26.8 ± 1.14
  Sm 5.26 5.28 5.01 4.96 5.21 5.35 5.28 5.52 5.26 5.30 ± 0.20
  Eu 1.06 1.08 1.06 0.98 0.96 1.13 1.06 1.1 1.04 1.07 ± 0.06
  Gd 4.59 4.61 4.5 4.22 4.26 4.92 4.35 4.75 4.38 4.58 ± 0.24
  Tb 0.733 0.718 0.705 0.67 0.715 0.75 0.715 0.752 0.735 0.73 ± 0.03
  Dy 3.94 3.9 3.82 3.77 3.76 4.11 3.81 4.13 3.79 3.93 ± 0.17
  Ho 0.811 0.796 0.782 0.747 0.836 0.828 0.802 0.835 0.815 0.81 ± 0.03
  Er 2.12 2.1 2.06 2 2.11 2.14 2.12 2.28 2.09 2.14 ± 0.08
  Tm 0.313 0.306 0.3 0.297 0.291 0.315 0.31 0.318 0.309 0.31 ± 0.01
  Yb 2.1 2.02 1.99 1.98 2.01 2.15 2.01 2.15 2.03 2.05 ± 0.09
  Lu 0.307 0.301 0.299 0.297 0.302 0.31 0.301 0.317 0.303 0.31 ± 0.01
  LREE 130 130 125 121 131 132 131 140 132 131 ± 5.61
  HREE 14.9 14.8 14.5 14.0 14.3 15.5 14.4 15.5 14.5 14.9 ± 0.60
  ΣREE 146 145 140 136 146 148 146 157 148 147 ± 6.16
  Eu/Eu* 0.945 0.962 0.98 0.935 0.892 0.968 0.974 0.942 0.945 0.956 ± 0.031
  Ce/Ce* 0.875 0.85 0.855 0.845 0.869 0.848 0.865 0.877 0.86 0.866 ± 0.017
Core No. GM7
 Section (cm) 0–1 31–32 46–47 61–62 76–77 91–92 121–122 136–137 151–152 166–167 180–181
  La 29.2 26.5 33.3 24.6 32.4 29.5 31.2 27.3 30.5 32 23.2
  Ce 57.1 53.3 63.3 50.2 63.4 55.3 59 52.3 61.9 62.3 49.8
  Pr 6.96 6.28 7.85 5.76 7.72 6.87 7.28 6.43 7.13 7.55 4.72
  Nd 25.1 23.9 28.1 20.1 27.5 24.9 26 22.9 25.8 27.1 18.2
  Sm 5.02 4.22 5.46 3.98 5.37 4.91 5.06 4.62 5.45 5.29 3.37
  Eu 0.983 0.967 1.11 0.88 1.11 0.995 1.05 0.981 1.01 1.07 0.821
  Gd 4.26 4.02 4.8 3.68 4.64 4.39 4.57 4.18 4.6 4.65 3.13
  Tb 0.686 0.651 0.753 0.59 0.746 0.676 0.712 0.651 0.732 0.725 0.501
  Dy 3.83 3.52 3.99 2.84 4.17 3.75 3.84 3.66 3.95 3.9 2.92
  Ho 0.76 0.742 0.821 0.54 0.828 0.756 0.778 0.736 0.829 0.796 0.52
  Er 2.09 2.01 2.2 1.41 2.22 1.99 2.03 2 2.12 2.11 1.34
  Tm 0.302 0.273 0.318 0.193 0.327 0.294 0.307 0.287 0.309 0.309 0.171
  Yb 2.06 1.72 2.13 1.26 2.12 1.99 1.98 1.93 2.07 1.99 1.14
  Lu 0.295 0.253 0.317 0.184 0.319 0.287 0.291 0.275 0.325 0.299 0.161
  LREE 123 114 138 105 136 121 129 114 131 134 99
  HREE 14.3 13.2 15.3 10.7 15.4 14.1 14.5 13.7 14.9 14.8 9.9
  ΣREE 139 128 154 116 153 137 144 128 147 150 110
  Eu/Eu* 0.933 1.03 0.952 1.01 0.976 0.941 0.963 0.98 0.887 0.944 1.11
  Ce/Ce* 0.872 0.9 0.852 0.92 0.872 0.845 0.853 0.859 0.914 0.874 0.93
 Section (cm) 196–197 210–211 222–223 226–227 241–242 256–257 300–301 316–317 330–331 Mean ± 1 s (n = 20)
  La 34.3 31.4 29.2 31.7 34.2 30.9 24.9 35.1 28.3 30 ± 3.37
  Ce 66.9 60.2 54.9 62.1 65.7 60.5 51.3 67.6 54.1 58.6 ± 5.64
  Pr 8.18 6.41 6.93 7.62 7.92 6.94 5.12 8.35 6.81 6.94 ± 0.96
  Nd 29.4 26.8 24.6 27.2 28.2 26.5 20.1 30.2 25.1 25.4 ± 3.13
  Sm 5.71 4.48 4.91 5.3 5.21 5.14 3.46 5.93 4.25 4.86 ± 0.70
  Eu 1.17 1.05 1 1.08 1.08 1.01 0.88 1.24 1.01 1.03 ± 0.10
  Gd 4.89 4.17 4.32 4.59 4.82 4.39 3.34 5.13 3.93 4.32 ± 0.51
  Tb 0.774 0.68 0.68 0.723 0.77 0.699 0.48 0.803 0.612 0.682 ± 0.085
  Dy 4.23 3.78 3.77 4 4.32 3.94 2.39 4.37 3.32 3.72 ± 0.51
  Ho 0.854 0.783 0.763 0.823 0.91 0.798 0.49 0.897 0.711 0.757 ± 0.115
  Er 2.27 2.09 2.01 2.17 2.34 2.09 1.28 2.33 2.01 2.01 ± 0.305
  Tm 0.343 0.289 0.296 0.314 0.351 0.309 0.181 0.339 0.31 0.291 ± 0.051
  Yb 2.17 1.98 1.91 2.08 2.24 1.99 1.12 2.26 2.01 1.91 ± 0.34
  Lu 0.332 0.271 0.285 0.307 0.361 0.298 0.171 0.346 0.291 0.283 ± 0.054
  LREE 144 129 121 134 141 130 105 147 119 126 ± 14
  HREE 15.9 14.0 14.0 15.0 16.1 14.5 9.5 16.5 13.2 14 ± 1.93
  ΣREE 161 144 136 150 158 146 115 165 133 141 ± 15
  Eu/Eu* 0.97 1.07 0.956 0.966 0.946 0.937 1.14 0.985 1.09 0.989 ± 0.065
  Ce/Ce* 0.869 0.921 0.84 0.87 0.87 0.898 0.986 0.859 0.848 0.878 ± 0.049
  1. Refer to Table 1, for water depth, latitude and longitude. Ce/Ce* denotes CeNASC/[(LaNASC)(PrNASC)]1/2, Eu/Eu* = EuNASC/[(SmNASC)(GdNASC)]1/2. NASC = North American shale composite (Gromet et al. 1984). LREE = La + Ce + Pr + Nd + Sm; HREE = Gd + Tb + Dy + Ho + Er + Tm + Yb + Lu